Remove zero-initialization of PreLightData

ScriptableRenderPipeline/HDRenderPipeline/Material/Lit/Lit.hlsl

 PreLightData GetPreLightData(float3 V, PositionInputs posInput, BSDFData bsdfData)
 {
     PreLightData preLightData;
-    ZERO_INITIALIZE(PreLightData, preLightData);
 
     float3 N;
     float  NdotV;